Burner for liquid fuel



P. LUCAS. BURNER FOR LIQUID FUEL. APPLICATION FILED FEB-6.1918.

Patentgd Aug. 2,1921.

UNITED STATES PAUL LUCAS, OF BERLIN-FRIEDENAU, GERMANY.

BURNER FOR LIQUID FUEL.

Application filed February 6, 1918.

T 0 all whom it may concern:

Be it known that 1, PAUL LUCAS, a citizen of Germany residing at Berlin-Friedenau, Germany, have invented certain new and useful Improvement-s in Burners for Liquid Fuel, of which the following is a specification.

This invention relates to burners for pctroleum and similar fuel and particularly to a burner having a spring actuated pump for producing compressed air by means of which the fuel is forced into the retort.

One object of the invention is to provide a burner of said class adapted for cooking purposes in which the pressure of the pump acting upon the piston is used to alter at will the amount of fuel forced into the retort whereby it is possible to alter at will the size of the flame between certain limits.

Another object of the invention is to construct the burner in such a manner that the air pump may be actuated by means of one hand only without danger of throwing over the burner.

In order that my invention may be properly understood, reference is had to the accompanying drawing forming part of the specification and in which Figure 1 is a vertical section through a burner according to the invention and Fig. 2 a section on the line ab of Fig. 1.

In a reservoir 1 containing the fuel a horizontally arranged pump cylinder 2 is provided in which a guide piece 3 carrying F a tightly fitting leather piston 4: loosely slides. y means of a disk 6 and a nut 5 the piston 4: is suitably fastened to the part 3. One end of a coiled spring 7 bears against the guide piece 3 and the other end bears against a preferably detachable plate 8, whereby said spring has the tendency to always press the piston forward in the cylinder. A cord or line 9 connected to the ide piece 3 is led over the grooved disks 10 and 11 and has attached thereto a weight 12 shaped as a handle.

In the pump cylinder 1 a tube 13 is fastened which is provided with a narrower portion 14 for the reception of a thin closure plate 15 serving as a non return valve. Said tube is covered by a tube 16 soldered to the cover of the reservoir and closed at its upper part.

Soldered to the cover of the reservoir 1 is, as will be seen from Fig. 2, an angularly bent tube 17, one end of which extends a1- Specification of Letters Patent.

Patented Aug. 2, 1921.

Serial no. 215,714.

most to the bottom of the reservoir while its other end extends into the retort pipe 18. The upper end of the retort pipe 18 is reinforced by a tube consisting of a good heat conductor such as copper for instance and carries the plate 20 provided with the nozzle 19 and connected to the plate 22 by means of three bars 21. The plates 20 and 22 as well as the bars 21 are made of a good heat conductor. Each of the bars 21 carries a pin 23 for the reception of the part 24. Fixed to the retort pipe 18 is the heating pan 25.

Connected to the reservoir 1 are three supports 26 adapted to receive a pot or the like. One of these supports carries the disk 11, over which the cord 9 is led. The said support 26 and the retort pipe 18 are arranged upon a metal plate 27 connected to the thin cover of the reservoir and serving to reinforce the said cover. A second metal plate 28 extending beyond the side wall of the reservoir is connected to the bottom thereof. An air tight closure must be provided for the screw 29 closing the entrance channel of the reservoir 1.

In practice the heating pan 25 is filled with spirit and the latter is ignited. A moment before the spirit is burnt the handle 12 is pulled downward and released. this single movement the piston will be pulled rearwardly in the cylinder and the spring compressed, so that the latter tends to force the piston forwardly in the cylinder and therefore to compress the air con tained in the cylinder. The air passes through the tube 13 into the reservoir and forces the fuel through the tube 17 into the retort. The vapor developing immediately in the hot retort tube escapes by the nozzle 19, is mixed with the air large amounts of which are carried into the mixer by the rush of gas and burns with a good non-luminous flame. Said flame heats the plate 22 whereby as the bars 21 reconduct the heat the retort also is heated and the carburation of the fuel maintained.

Should the handle 12 be pulled downward during operation, backflow of the compressed air and therefore extin uishing of the flame is prevented by the plate 15. As said plate 15 only acts as a non-return valve at times a tight fit is not required and its weight may therefore be very small so that even during the lowest pressure of the piston passage of the air from the cylinder 2 to the reservoir is not prevented by this plate.

In order to extinguish the flame the till screw must be opened.

The dimensions of the cylinder are such that by pulling the handle down to its lowest position once the burner will operate for the same length of time as would the old burners if the pump were operated about twenty times.

The highest pressure of the spring is about 2.5 kg. and the gas pressure produced in thc retort is about 60 cm. water column. This pressure is fully sufiicient to produce a very great perfectly non-luminous flame.

with the other hand as the line of movementof the hand actuating the handle is directed downwardly and passes through the support plate 28 of the burner.

It is obvious that by pulling down the weight 12 more or less the spring 7 will be compressed more or less and therefore a greater or less amount of fuel will he forced into the retort, so that in this manner the size of the flame may be altered at will between certain limits.

By opening the filling screw of the reservoir a smaller flame of the burner may be obtained.

What I claim as my invention is- 1. In a burner of the character described, the combination with a fuel reservoir, of a pump cylinder in communication therewith, a piston movable in said cylinder, compressible means tending to normally hold said piston in inoperative position within the for moving said piston in one direction in the cylinder.

2. In a burner of the character described, the combination with a fuel reservoir, of a pump cylinder in communication therewith, a spring tending to normally hold said piston in inoperative position at one end of said cylinder, and downwardly movable means for moving said piston to the other end of said cylinder to initiate its operation.

3. In a burner of the character described, the combination with a fuel reservoir, of a pump cylinder in communication therewith, a piston movable in said cylinder, compressible means tending to normally hold said piston in inoperative position within the cylinder, a cord attached to said piston, and guides for said cord arranged relatively to each other whereby downward pull on said cord will initiate operative movement of said piston.

4. In a burner of the character described, the combination with a fuel reservoir, of a pump cylinder in communication therewith, a piston movable in said cylinder, a spring tending to normally force said piston into,

inoperative position at one end of the cylinder, a cord attached to said piston, guides arranged one above the other over which said cord passes, and a weighted reinforcement for said reservoir in substantially vertical alinement with said guides.

In testimony whereof I afiix my signature in presence of two witnesses.

PAUL LUCAS.

Witnesses: r

M. NAUMANN, A. NETTIENY. 

